diff --git a/boa_gc/src/internals/gc_box.rs b/boa_gc/src/internals/gc_box.rs
index 61e61f19195..e5e5dd1b92e 100644
--- a/boa_gc/src/internals/gc_box.rs
+++ b/boa_gc/src/internals/gc_box.rs
@@ -85,9 +85,9 @@ impl fmt::Debug for GcBoxHeader {
 
 /// A garbage collected allocation.
 #[derive(Debug)]
-pub struct GcBox<T: ?Sized + 'static> {
+pub struct GcBox<T: Trace + ?Sized + 'static> {
     pub(crate) header: GcBoxHeader,
-    pub(crate) value: T,
+    value: T,
 }
 
 impl<T: Trace> GcBox<T> {
diff --git a/boa_gc/src/pointers/ephemeron.rs b/boa_gc/src/pointers/ephemeron.rs
index cce6d363afa..c63da65fd72 100644
--- a/boa_gc/src/pointers/ephemeron.rs
+++ b/boa_gc/src/pointers/ephemeron.rs
@@ -77,7 +77,7 @@ impl<K: Trace + ?Sized, V: Trace> Ephemeron<K, V> {
         self.inner_ptr.get().as_ptr()
     }
 
-    pub(crate) fn inner(&self) -> &EphemeronBox<K, V> {
+    fn inner(&self) -> &EphemeronBox<K, V> {
         // SAFETY: Please see Gc::inner_ptr()
         unsafe { self.inner_ptr().as_ref() }
     }